Blackboard eraser

The utility model discloses a blackboard eraser, which comprises a board body, wherein a handle and a fork-shaped extensible rod are evenly distributed on the board body. Two end heads of the fork-shaped extensible rod are respectively arranged on the board body on two sides of the handle, and the board body is provided with a fixed support seat matched with the fork-shaped extensible rod. The fixed support seat is provided with a clamping groove matched with the fork-shaped extensible rod. The front end of the board body is provided with an accommodating cavity, a brush head capable of moving inside the accommodating cavity is arranged inside the cavity, and a strip-shaped hole is arranged on the wall of the accommodating cavity, and the rear end of the brush head is provided with a round pushing hand capable of moving inside the strip-shaped hole. The brush head is arranged at the front end of the board body, users can push the brush head out for cleaning chalk powder inside a blackboard groove or push the